docs: def get_tag_version(nrml_node):
      """
      Extract from a node of kind NRML the tag and the version. For instance
      from '{http://openquake.org/xmlns/nrml/0.4}fragilityModel' one gets
      the pair ('fragilityModel', 'nrml/0.4').
      """
      version, tag = re.search(r'(nrml/[\d\.]+)\}(\w+)', nrml_node.tag).groups()
      return tag, version